﻿// MIT License (MIT)
// 
// Copyright (c) 2014 K Ercan Turkarslan
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
// 

using System;
using System.IO;
using System.Net;
using System.Net.Http;

namespace Mios.MiosConnection
{
    public static class HttpConnection
    {
        // Vera does not have a consistent behavior for error. The error reporting 
        // behavior may even change depending on whether http call is local or remote.
        //
        // This method needs to be updated/rewritten overtime for various error conditions.
        public static String HttpGetString(String httpString, String mmsAuth = null, String mmsAuthSig = null)
        {
            if ((mmsAuth == null) && (mmsAuthSig != null))
                throw new ArgumentNullException("mmsAuth");

            if ((mmsAuth != null) && (mmsAuthSig == null))
                throw new ArgumentNullException("mmsAuthSig");

            try
            {
                using (var httpClient = new HttpClient())
                {
                    httpClient.Timeout = TimeSpan.FromMinutes(2);

                    if (mmsAuth != null)
                    {
                        httpClient.DefaultRequestHeaders.Add("MMSAuth", mmsAuth);
                        httpClient.DefaultRequestHeaders.Add("MMSAuthSig", mmsAuthSig);
                    }

                    var httpTask = httpClient.GetStringAsync(httpString);

                    httpTask.Wait();

                    if (httpTask.IsCanceled)
                        throw new MiosConnectionException("HttpGetString canceled!", httpTask.Exception);

                    if (httpTask.IsFaulted)
                        throw new MiosConnectionException("HttpGetString failed!", httpTask.Exception);

                    if (httpTask.Result.StartsWith("error:"))
                        throw new MiosConnectionException(httpTask.Result);

                    return httpTask.Result;
                }
            }
            catch (AggregateException ex)
            {
                throw new MiosConnectionException("HttpGetString failed!", ex);
            }
            catch (WebException ex)
            {
                throw new MiosConnectionException("HttpGetString failed!", ex);
            }
        }

        // Vera does not have a consistent behavior for error. The error reporting 
        // behavior may even change depending on whether http call is local or remote.
        //
        // This method needs to be updated/rewritten overtime for various error conditions.
        public static Stream HttpGetStream(String httpString, String mmsAuth = null, String mmsAuthSig = null)
        {
            if ((mmsAuth == null) && (mmsAuthSig != null))
                throw new ArgumentNullException("mmsAuth");

            if ((mmsAuth != null) && (mmsAuthSig == null))
                throw new ArgumentNullException("mmsAuthSig");

            try
            {
                using (var httpClient = new HttpClient())
                {
                    httpClient.Timeout = TimeSpan.FromMinutes(2);

                    if (mmsAuth != null)
                    {
                        httpClient.DefaultRequestHeaders.Add("MMSAuth", mmsAuth);
                        httpClient.DefaultRequestHeaders.Add("MMSAuthSig", mmsAuthSig);
                    }

                    var httpTask = httpClient.GetStreamAsync(httpString);

                    httpTask.Wait();

                    if (httpTask.IsCanceled)
                        throw new MiosConnectionException("HttpGetString canceled!", httpTask.Exception);

                    if (httpTask.IsFaulted)
                        throw new MiosConnectionException("HttpGetString failed!", httpTask.Exception);

                    return httpTask.Result;
                }
            }
            catch (AggregateException ex)
            {
                throw new MiosConnectionException("HttpGetStream failed!", ex);
            }
            catch (WebException ex)
            {
                throw new MiosConnectionException("HttpGetStream failed!", ex);
            }
        }
    }
}